package com.project.shiro;

import com.project.bean.UserBean;
import com.project.service.IUserService;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class CustomRealm extends AuthorizingRealm {
    @Autowired
    private IUserService service;

    public CustomRealm() {
        //凭证匹配器
        HashedCredentialsMatcher matcher = new HashedCredentialsMatcher();
        //设置加密算法
        matcher.setHashAlgorithmName("md5");
        //设置散列次数
        matcher.setHashIterations(1024);
        //设置编码
        matcher.setStoredCredentialsHexEncoded(true);
        this.setCredentialsMatcher(matcher);
    }

    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        UserBean user = (UserBean) principalCollection.getPrimaryPrincipal();
        if (user != null) {
            SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
            user.getRoleList().forEach(n -> {
                info.addRole(n.getRoleName());
            });
            user.getGradeList().forEach(n -> {
                info.addStringPermission(n.getContent());
            });
            return info;
        }
        return null;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        String userName = authenticationToken.getPrincipal().toString();
        UserBean user = service.findByName(userName);
        if (user != null) {
            return new SimpleAuthenticationInfo(user, user.getPwd(), ByteSource.Util.bytes(user.getSalt()), this.getName());
        }
        return null;
    }
}
